Fixed discrepancy between the subscores and the total score and added some tests.
ORA-199
Merge pull request #155 from edx/waheed/ora199-flagged-essay-scoring-discrepancy

Fixed discrepancy between the subscores and the total score and added some tests
reading course_data_path from env.json
Merge pull request #156 from edx/jarv/ora-course-dir

reading course_data_path from env.json